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Inline application of digital holography [Invited]

: Fratz, Markus; Beckmann, Tobias; Anders, Joachim; Bertz, Alexander; Bayer, Markus; Gießler, Thomas; Nemeth, Christian; Carl, Daniel


Applied optics 58 (2019), Nr.34, S.G120-G126
ISSN: 0003-6935
ISSN: 1539-4522
ISSN: 1559-128X
Fraunhofer IPM ()
Digital Holographic Imaging; image processing; laser beam; polarization maintaining fiber; Speckle pattern; white light interferometry

We describe the inline integration of the digital holographic sensor HoloTop in a precision turning plant. A fully automated part-handling system that fulfills the requirements for cycle time and stability was built and integrated into the production process. The inspection system has been running in multishift operation since 2015. For the first time, to the best of our knowledge, the results of one-year, long-term height measurements of 10 million parts under rough production conditions are presented to verify the suitability for industrial use.